Which one of the following statements does not support the argument against multiple independent origins of eyes?
A. The light-sensitive molecule for all lightsensing
cells is the same, a derivative of
vitamin A complexed with a protein called
opsin.
B. Eye defects arise from Pax6 mutations in
many different organisms.
C. Pax6 DNA and protein sequences are
highly conserved in a wide range of
organisms.
D. Pax6 protein is so central to eye
development that after transferring the mouse
Pax6 to the fruit fly, the fly produced eyes
similar to that of a mouse.
E. The Pax6 gene evolved early and is
shared among a wide range of animals,
despite the structural diversity in their final
adult eyes.
D
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Which of the following cell types are specifically responsible for the B cell response?
A) T cells B) B cells C) phagocytic cells D) natural killer cells
Cellular respiration is the process by which ____ and ____ are converted to water and carbon dioxide
during the formation of cellular energy
a. CO2; glucose b. CO2; fats c. O2; CO2 d. O2; glucose e. ATP; O2
The primary producers for hydrothermal vent
ecosystems are a. chemoautotrophs. b. chemoheterotrophs. c. phytoplankton. d. cyanobacteria. e. algae.
Which of the following statements concerning mycorrhizae is FALSE?
a. They are symbiotic associations between a fungus and a plant root. b. They increase the uptake of nutrient minerals by the plant. c. Arbuscular mycorrhizae are extracellular. d. Endomycorrhizae are intracellular. e. Members of the Glomeromycota may be involved.